Heavy-duty paper shipping carton having interlocking end closure



Odi- 29, 1946- F. R. EaUl-IRMASTER HEAVY DUTY PAPER SHIPPING CARTON HAVING INTERLOCKING END CLOSURE 2 Sheets-Sheet 1 Filed July'l, 1944 gli HEAVY DUTY PAPER SHIPPING CARTON HAVING INTERLOCKIG vEND CLOSURE- Filed July l5, 1944 2 Sheets-Sheet 2.

Patented Oct. 29, 1946 HEAVY-DUTY PAPER SHIPPING CARTON HAVING INTERLOCKING END CLOSURE.

Frederick R. Buhrmaster, Webster Groves, YMo., assignor to Gaylord Container Corporation, St.

, Louis, Mo., a corporation of Maryland ApplicationJuly13, 1944, Serial No. 544,685

1o claims'. 1

This invention relates to containers, particularly heavy duty shipping cartons ofthe kind shown in Beaman Patent No. 2,214,220 dated September 10, 1941 wherein the tubular body and end closures of the carton have side apsthat are held in interlocking engagement by anexterior encircling band. The principal object of `the present invention is to simplify rthe cover locking arrangement of such cartons and the-D- eration of attaching the cover to the body. The invention consists in a carton khavingra tubular body with endl aps that are adapted to be folded against the outside face thereof and end closures with rim flaps that overlap thefolded body flaps and have rebent end portions that are disposed in endwise abutting relation to the'free ends of saidA folded bodyflaps and thus prevent endwise removal'. of the end closures from said body. The inventiony also consists in the means for locking the rebent end closure flaps in rim forming rela: tion; and it also consists'v in the carton closure and in the parts and combinations and arrangements of parts hereinafter described and claimed. In the accompanying drawings, which form part of this specification, and wherein like symbols referto like parts Wherever they occur, y

Fig. 1 is a side elevational view. of va shipping carton embodying my invention, 4 y. l Fig. 2 is` anA enlarged partial verticalv sectional Fig. 3 is a fragmentary endel'evational View of the carton, the carton beingshown partially in horizontal cross-section on the line :3-3 in Fig. 2', 4 i Y Fig..4 is a fragmentary crosslv-sefcti'onal View on the line 4-4 in Fig. 2, n

Fig. 5 is aside elevational ,view-showing'. the body and end closure beforeas'sembly,

Fig. 6 is a` vertical sectional view of said body and end closure on tlfie'lii'iel---lv in Fig. 5',

Fig. 7 is an innerend View of saidvend closure, Fig. 8 is a plan View of the cover-blank, Y Fig. 9 is laY partialelevation ofthe body blank,

Fig'. 10 is apartial side. elevational View of a V shipping container provided.` with an end closure of modified form, y

. Fig. 11 is an enlarged fragmentary vertical secl-` tional view on the'line lI-H in Fig. 10, I

Fig. 12.is a view simiiartorig. 11, showing the positions of the cooperating lend c1osure and body tabs before said tabs are drawn,y inwardly, into locked position; and

My invention isr shown embodied in a heavy duty shipping carton lof the type shown in Beaman Patent No. 2,214,220. The carton shown in Figs. 1 to 9, inclusive, includes' a tubular body A and preformedslip covers or closures B for the ends thereof, all made, of corrugated board, berboard or other bendable material. The tubular body A is divided by longitudinalcreases or scores l into side panels 2 and is made from a flat blank whose l ends areV overlapped vand permanently secured together, `preferably by staples 3. Each sidepanel 2 has ateach end thereof a projecting flap 4 adapted to befolded into proximity with the outside faceof said. panel, a score line 5 being provided tov facilitate folding of said iiap,

Eachv end 'closure Bis p fasliape corresponding to the shape'of the paneled body member A and has side marginalflaps G corresponding in number to the body flaps kll.v AThe side marginal flaps 6 of the-v end closure B are bent along score lines 'l Y at right angles` to the body. `portion thereof andhave extensions or continuationsathat are marked off by means of vwide scores or creases la and folded or rebent on their inner sides. The bent. side-marginal flapsv 6 are permanently connected 'together lin end to end relation around the periphery'of the end closure B1 toform a rigid rimv B1 therefor'. The connecting means. forthe bent ,rim forming flapsv (iv preferably comprises a closedcircularbandor hoopv of metaly or other l suitablek material ,which liesj within the folded portions 6a yof saidiaps and extends from one flap to another and holdsv'them in rim forming relation.A The; rebentsportiona of the end closure -aps b. are .rigidly and Apermanently. secured thereto preferably by means. of Vstaples 9; and

` theser staples Nare llocated.between*the retaining ringv or hoop 8 and. thev4 free longitudinal:edges 'f of saidrebent portions offsaid end closure flaps andv thusserve to retain said ring or hoop withinv the rim'portion Blof the end closureB.

By the varrangement described, when the end closure B is forced over the end-ofthe Ybody A, the outstanding flaps 4 onsaid. endr of said body are bent. inwardly. .bythe rim" B1 of said closure againstfthe outsideface of said body. Continued yendwise movement of: the. endfclosure" B causes. the rebent portions or extensions 6a of the rimforming flaps -6 thereof to ride over the foldedv body flaps l Whichyieldinwardly with said body and then spring outwardly across the ends of said rebent portions of. saidrim forming aps.

Fig. 13 is a piany view of the..mooiiid.er iq1o.. f

sure, the.y flaps thereof in the position 'shown in 55 Fig. 12`.

By this 4iarrangement, the internal shoulder vIl' formed'in tl'ie-rim'll ofthe endv closure B by the rebent portionsza of the rim vforming-aps n6 thereof abuts against the external shoulder l2 formed on the body A by the folded end flaps 4 thereof, thus permanently locking said end closure to said body.

The hereinbefore described construction has several important advantages.4 It is simplenand economicalnand permits the end closure B ofthe carton to be quickly and easily mounted on and securely locked to the body A. The continuous hoop or band 8 in the rim B1 of the end closure B serves to rigidly hold the bent' flaps 6a of said end closure in end to end rim forming relation, whereby said rim is rigid enough to force the side panels 2 and the end flaps 4 thereof inwardly when said end closure is telescoped over the end of said body and to prevent lateral disengagement of the abutting shoulders l l and l2 after-,said side' panel flaps snap over the rebent portions 6a of said end closure flaps.

In the modified formof end closure shown in a;

Figs. 410 to 13, inclusiveth'e band'for holding the side marginal flaps E of the end closure B in rim forming relation isin the formof a wire-8a. that islocated in the folded portions lia of said flaps with' its utwo ends extending outwardly through f notches I3 provided therefor in the meeting ends loftwo adjacent flaps. lWith -this form of retaining band, the end closure B is placed over the end of the body A with the free longitudinale'dges III of the rebent portions Goof-the inclined end closure flaps G inedgewise abutting'relation to the free ends l2 of theA inclined bodyflaps 4, after which the Wire 8a is tightened to swing the engaged end closure and body flaps inwardly alongside of the body panels 2. AThe cooperating flaps are then securely locked in'such position by twistingn together theY exposed-ends =8b of the wire 8a. By this arrangement,the end'closure is locked tightlyto Vthe'body but may be quickly and easily removed therefrom by cutting the locking Wire 8a or untwisting the exposed-twisted ends 8b thereof.

`Obvio'usly,ftlie V hereinbefore described carton construction admits of considerable modification ternal shoulder, and a band infolded Within said folded portions of said bent closure flaps for holding them in such rim forming relation.

3. A carton comprising a tubular body and a closure for an open end thereof, said body having an external peripheral shoulder ,thereon adjacent to said end thereof, and said closure having a rim portion that' surrounds said end of said body land has an internal shoulder disposed in abutting relation to the external shoulder thereof, said rim portion of said closure comprising a. plurality of side marginal flaps on said closure bent into end to end rim forming relation and thence rebent on their inner sides to form said internal shoulder, a

band infolded vwithin said 'rebent portions of said closure flaps for holding them in such rim forming relation, and .means for securing said rebent without departing' from the invention. There-l fore", I do not wish to be limited to the precise arrangements nshown and described., "Whtclaimis:

' 1.'A-carton comprising a tubular body and a closure-forfanfopen *end thereof, said body; having 'anvr external peripheral` shoulder thereon" adl jacent to said jend thereof, and said Yclosure having arim portion that-surrounds said end of said body andh'as an yinternalshoulder',,disposed in abuttingrelation to the externa'shoulder'thereof, said rirnl portion of Vsaid/,closure comprising a plurality of side marginal fiiaps on'rs'aid closure bent into riml forming relation and having portions folded upon and'lsecureddirectly to theinner sides'ofsaid bentV flaps to form said internal shoulder, and means inclsed'within the folded portions of said bent flaps without being directly secured; thereto 'for` holdingr them in such rib forming relation. l i

v-2; A carton comprising'atubulanboldy and a closurefor `an open end thereof, saidbody having'an external peripheral "shoulder thereon adjacent to said end `thereof;and's'aidclosurehavf ing a rim `portion thatsurrounds "said e'rfldv ofgsaid bodyA and hasn'anLinternal shoulder disposed; in abutting 'relation to the* external shoulderl thereof, said rim portion of said closure comprising a plurality of side]rriargir'iall flaps onY said closure bent into 'rim' forming relation i and having por-A tions folded uponj Yand' secured-idirectly tof ,the inner sides of said bent flaps-to'form said vin"- portions directly to said closure flaps and for retaining said band therein,

fl. A carton comprising a tubular body and a slipfclosure for an open end thereof, said body having anexternal peripheral shoulder thereon adjacent to said end thereof, and said closure having' a rim portion with an internal shoulder adapted to ride over and seatback of said externalshoulder when 'said closure is slipped over said end of said body, said rim portion Vof said closure comprising a plurality of side marginal flaps on said closure bent into rimforming relation and having portions folded vupon and secured directly to the inner sides of said' bent flaps to form -said Ainternal shoulder, and vmeans located within said folded portions of said bent closure flaps without being ldirectly secured thereto for permanently holding them in suchjrim forming relation.

5. A carton comprising a tubular body and a s1ip closure"for an open .end thereofysaid body having anv externalperipheral'shoulder thereon adjacent tov saidend thereof, and said closure having a `rim portion with aninternal shoulder adapted Yto rideover andV seat back of said external shoulder when said closure is slipped over said end of said body, said rim portion of said clos-ure comprising a plurality of side marginal flaps` onsaid closure bent into rim forming relation and having portions folded upon and secured directly to the innersides of said bent flaps to forrn'saidV internal' shoulder, and arclosed band infoldeduinl the folded Iportions ofrall of' thev bent iiaps fof" said I closure4 for permanently Yholding them rim'forming relation. b' 6; Acarton comprising a tubular body anda y closure for an open end thereof, said body having ane'xt'ernal peripheral shoulder thereon'adjacent to said end thereof, and lsaid closure having arim-portionthatsurroundsisaid end of said body and has-fan i'n-t er;'r lal"shoulderV disposed in abutting relation to thefexternal shoulder thereof, said rim-portion of saidclosure comprising a pluralitybfside marginal'flapson said closure bent into rim-*forming relation and thence rebent on their innery sides toform saidf internal shoulder, a bandV locatedlwithin saidrebfent'- portions of said closure aps for holding'them togetherin such rim forming relation, and `means forfsecuringl said rebentvportions',directly Vtosaid closure flaps between the `ends thereof Yand said band, said band comprising a wirehaving its ends extending outwardlyl between two'adjacent closure flaps and securedt'ogeth'er. f

'7, A carton comprising atubular body and a slip closure forA 1an"A openend thereof, said body l having a'plurality of flaps at said end-adapted-to fold against the outer side Aface thereof to'form an external peripheral shoulder thereon, and said end closure having a rim portion that surrounds said bent body flaps and an internal shoulder disposed in abutting relation to said external shoulder, said rim portion of said closure comprising a plurality of side marginal flaps on said closure bent into rim forming relation and thence rebent to form said internal shoulder, means for securing said rebent portions directly to said flaps, and a continuous band inclosed within the rebent portions of said flaps for holding thern in such rim forming relation.

8. A carton comprising a tubular body and a slip closure for an open end thereof, said body having a plurality of flaps at said end adapted to fold against the outer side face thereof to form an external peripheral shoulder thereon, and said end closure having a rim portion that surrounds said bent body aps and has an internal shoulder disposed in abutting relation to said external shoulder, said rim portion of said closure comprising a plurality of side marginal flaps on said closure bent into rim forming relation and thence rebent to form said internal shoulder, means for securing said rebent portions directly to said iiaps, and a continuous band inclosed within the rebent portions of said ilaps for holding them in such rim forming relation, said band comprising a wire having its ends extending outwardly between two adjacent closure naps and detachably secured together.

9. A carton closure having a rim portion with an internal peripheral shoulder, said rim portion comprising a plurality of side marginal flaps on said closure bent into rim forming relation and thence rebent on their inner sides and rigidly secured directly thereto to form said internal shoulder, and means inclosed within the rebent portions of said aps for holding them together in such rim forming relation.

10. A carton closure having a rim portion with an internal peripheral shoulder, said rim portion comprising a plurality of side marginal flaps on said closure bent into rim forming relation and thence rebent on their inner sides and rigidly secured directly thereto to forrn said internal shoulder, and a band located within the rebent portions of said flaps for holding them together in such rim forming relation, said band comprising a wire having its ends extending outwardly between two adjacent flaps, whereby said naps are adapted to be drawn into rim forming relations by tightening said wire and locked in such relation by securing together the ends of the tightened wire.

FREDERICK R. BUHRMASTER. 

